High-Temperature Thermal Conductivity Measurement Apparatus Based on Guarded Hot Plate Method

  • E. Turzo-AndrasEmail author
  • T. Magyarlaki
Part of the following topical collections:
  1. TEMPMEKO 2016: Selected Papers of the 13th International Symposium on Temperature, Humidity, Moisture and Thermal Measurements in Industry and Science


An alternative calibration procedure has been applied using apparatus built in-house, created to optimize thermal conductivity measurements. The new approach compared to those of usual measurement procedures of thermal conductivity by guarded hot plate (GHP) consists of modified design of the apparatus, modified position of the temperature sensors and new conception in the calculation method, applying the temperature at the inlet section of the specimen instead of the temperature difference across the specimen. This alternative technique is suitable for eliminating the effect of thermal contact resistance arising between a rigid specimen and the heated plate, as well as accurate determination of the specimen temperature and of the heat loss at the lateral edge of the specimen. This paper presents an overview of the specific characteristics of the newly developed “high-temperature thermal conductivity measurement apparatus” based on the GHP method, as well as how the major difficulties are handled in the case of this apparatus, as compared to the common GHP method that conforms to current international standards.


Heat transfer High-temperature guarded hot plate Thermal conductivity Thermal contact resistance 

List of symbols


guarded hot plate


high-temperature thermal conductivity measurement apparatus


thermal contact resistance

\(\lambda \)

thermal conductivity


heat flow in axial direction


heat loss in radial direction


metering area of the heater plate


temperature function in the metering zone


temperature function in the guard zone


temperature of the inner surface of the gap


temperature of the outer surface of the gap

\(\Delta \hbox {t}\)

temperature drop across the specimen


specimen thickness


mean temperature of the specimen


temperature derivative of the specimen


electrical power supplied to the heater plate


heat flow at the inlet section of the specimen


heat flow loss at the guard-center gap


total heat flow loss across the center-guard gap


conductive heat flow across the gap


radiative heat flow across the gap


temperature of the inlet section of the specimen


temperature of the outlet section of the specimen


temperature of the hot plate surface


temperature of the cold plate surface


density of heat flow rate


TCR at inlet section of the specimen


TCR at outlet section of the specimen



This work was funded through the European Metrology Research Programme (EMRP) Project SIB 52 “Thermo”—Metrology for Thermal Protection Materials. The EMRP is jointly funded by the EMRP participating countries within EURAMET and the European Union.


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Copyright information

© Springer Science+Business Media, LLC 2017

Authors and Affiliations

  1. 1.Magyar Kereskedelmi Engedelyezesi Hivatal (MKEH)BudapestHungary

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